projects / people / pmueller / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 6a930a95 BS |
1 | From: Kurt Garloff <garloff@suse.de> |
| 2 | Subject: [PATCH] X86: sysctl to allow panic on IOCK NMI error | |
| 3 | References: bnc427979 | |
| 4 | ||
| 5 | This patch introduces a sysctl /proc/sys/kernel/panic_on_io_nmi., | |
| 6 | which defaults to 0 (off). | |
| 7 | When enabled, the kernel panics when the kernel receives an NMI | |
| 8 | caused by an IO error. | |
| 9 | ||
| 10 | The IO error triggered NMI indicates a serious system condition, | |
| 11 | which could result in IO data corruption. Rather than contiuing, | |
| 12 | panicing and dumping might be a better choice, so one can figure | |
| 13 | out what's causing the IO error. | |
| 14 | This could be especially important to companies running IO intensive | |
| 15 | applications where corruption must be avoided, e.g. a banks databases. | |
| 16 | ||
| 17 | ||
| 18 | Signed-off-by: Roberto Angelino <robertangelino@gmail.com> | |
| 19 | ||
| 20 | ||
| 21 | Automatically created from "patches.suse/panic-on-io-nmi.diff" by xen-port-patches.py | |
| 22 | ||
| 23 | Index: head-2008-11-25/arch/x86/kernel/traps_32-xen.c | |
| 24 | =================================================================== | |
| 25 | --- head-2008-11-25.orig/arch/x86/kernel/traps_32-xen.c 2008-11-25 12:57:05.000000000 +0100 | |
| 26 | +++ head-2008-11-25/arch/x86/kernel/traps_32-xen.c 2008-11-25 13:13:12.000000000 +0100 | |
| 27 | @@ -83,6 +83,7 @@ gate_desc idt_table[256] | |
| 28 | #endif | |
| 29 | ||
| 30 | int panic_on_unrecovered_nmi; | |
| 31 | +int panic_on_io_nmi; | |
| 32 | int kstack_depth_to_print = 24; | |
| 33 | static unsigned int code_bytes = 64; | |
| 34 | static int ignore_nmis; | |
| 35 | @@ -670,6 +671,9 @@ io_check_error(unsigned char reason, str | |
| 36 | printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n"); | |
| 37 | show_registers(regs); | |
| 38 | ||
| 39 | + if (panic_on_io_nmi) | |
| 40 | + panic("NMI IOCK error: Not continuing"); | |
| 41 | + | |
| 42 | /* Re-enable the IOCK line, wait for a few seconds */ | |
| 43 | clear_io_check_error(reason); | |
| 44 | } | |
| 45 | Index: head-2008-11-25/arch/x86/kernel/traps_64-xen.c | |
| 46 | =================================================================== | |
| 47 | --- head-2008-11-25.orig/arch/x86/kernel/traps_64-xen.c 2008-11-25 12:57:05.000000000 +0100 | |
| 48 | +++ head-2008-11-25/arch/x86/kernel/traps_64-xen.c 2008-11-25 13:13:12.000000000 +0100 | |
| 49 | @@ -56,6 +56,7 @@ | |
| 50 | #include <mach_traps.h> | |
| 51 | ||
| 52 | int panic_on_unrecovered_nmi; | |
| 53 | +int panic_on_io_nmi; | |
| 54 | int kstack_depth_to_print = 12; | |
| 55 | static unsigned int code_bytes = 64; | |
| 56 | static int ignore_nmis; | |
| 57 | @@ -772,6 +773,9 @@ io_check_error(unsigned char reason, str | |
| 58 | printk("NMI: IOCK error (debug interrupt?)\n"); | |
| 59 | show_registers(regs); | |
| 60 | ||
| 61 | + if (panic_on_io_nmi) | |
| 62 | + panic("NMI IOCK error: Not continuing"); | |
| 63 | + | |
| 64 | /* Re-enable the IOCK line, wait for a few seconds */ | |
| 65 | clear_io_check_error(reason); | |
| 66 | } |